diff --git a/src/backend/postmaster/auxprocess.c b/src/backend/postmaster/auxprocess.c
index ba8c9add67a..9803a0ee2a1 100644
--- a/src/backend/postmaster/auxprocess.c
+++ b/src/backend/postmaster/auxprocess.c
@@ -98,6 +98,14 @@ AuxiliaryProcessMainCommon(void)
 
 	RESUME_INTERRUPTS();
 
+	/*
+	 * Initialize the process-local logical info WAL logging state.
+	 *
+	 * This must be called after ProcSignalInit() so that the process can
+	 * participate in procsignal-based barriers that update this state.
+	 */
+	InitializeProcessXLogLogicalInfo();
+
 	/*
 	 * Auxiliary processes don't run transactions, but they may need a
 	 * resource owner anyway to manage buffer pins acquired outside
diff --git a/src/backend/utils/init/postinit.c b/src/backend/utils/init/postinit.c
index ecf78b9a986..2460e550f96 100644
--- a/src/backend/utils/init/postinit.c
+++ b/src/backend/utils/init/postinit.c
@@ -662,9 +662,6 @@ BaseInit(void)
 	/* Initialize lock manager's local structs */
 	InitLockManagerAccess();
 
-	/* Initialize logical info WAL logging state */
-	InitializeProcessXLogLogicalInfo();
-
 	/*
 	 * Initialize replication slots after pgstat. The exit hook might need to
 	 * drop ephemeral slots, which in turn triggers stats reporting.
@@ -833,6 +830,16 @@ InitPostgres(const char *in_dbname, Oid dboid,
 		before_shmem_exit(ShutdownXLOG, 0);
 	}
 
+	/*
+	 * Initialize the process-local logical info WAL logging state.
+	 *
+	 * This must be called after ProcSignalInit() so that the process can
+	 * participate in procsignal-based barriers that update this state.
+	 * Furthermore, in !IsUnderPostmaster cases, this must occur after
+	 * StartupXLOG() where the shared state is first established.
+	 */
+	InitializeProcessXLogLogicalInfo();
+
 	/*
 	 * Initialize the relation cache and the system catalog caches.  Note that
 	 * no catalog access happens here; we only set up the hashtable structure.